DNA match sought to Zodiac Killer after break in other case

by Associated Press

A San Francisco Police Department wanted bulletin and copies of letters sent to the San Francisco Chronicle by a man who called himself Zodiac are displayed Thursday, May 3, 2018, in San Francisco. Detectives in Northern California are trying to get a DNA profile on the Zodiac Killer to track him down using the same family-tree tracing technology investigators used in the Golden State Killer case. Vallejo police Detective Terry Poyser tells the Sacramento Bee his agency has recently submitted two envelopes that contained letters from the Zodiac Killer for DNA analysis. The Zodiac Killer stabbed or shot to death five people in Northern California in 1968 and 1969. He was dubbed the Zodiac Killer after he sent taunting letters and cryptograms to police and newspapers that included astrological symbols. (AP Photo/Eric Risberg)

Several months ago, the Vallejo Police Department sent two letters written by the Zodiac Killer to a private lab in hopes of finding his DNA on the back of the stamps or envelope flaps that may have been licked. They are expecting results soon.

"They were confident they would be able to get something off it," Vallejo police Detective Terry Poyser told the Sacramento Bee.

Some privacy advocates say they are concerned with the process and worry about future abuses, but detectives investigating the Zodiac Killer say they hope the technique will help solve one of the most vexing cold cases in the country.

"That's a great idea," said Gary Harmor, founder and director of the Serological Research Institute, a private DNA lab. "I think we'll see more investigations use this technique."

Detectives in Southern California are testing DNA collected from a double-murder and rape to see if they can be tied to DeAngelo. Another man, Craig Coley, was recently cleared of those crimes after spending 38 years in prison in the murder of a 24-year-old college student and her 4-year-old son in 1978.

The Zodiac Killer fatally stabbed or shot to death five people in Northern California in 1968 and 1969, then sent taunting letters and cryptograms to the police and newspapers. The Vallejo police are the lead investigators because the first two victims were killed there.

Various pieces of evidence, including a rope used to tie a victim as well as the letters, have been tested unsuccessfully for the killer's DNA profile. Poyser said recent advances in DNA testing prompted investigators to seek a match on two of the killer's letters.

Vallejo Mayor Bob Sampayan said the samples were sent to the lab as a matter of routine. Sampayan, a former homicide detective, said police submit samples every couple of years in hopes that advances in DNA testing will finally yield a profile detectives can use.

"It was coincidental," Sampayan said of the new DNA test occurring at the same time as the breakthrough in the Golden State Killer case.

"There will come a time when we get a match," he said.

The 2007 movie "Zodiac," starring Jake Gyllenhaal and Robert Downey Jr., renewed widespread interest in a case that has always had a cult following of amateur detectives and cryptographers who sought to crack the killer's code.

One of those amateur sleuths, Tom Voigt, said the key to solving the Zodiac killings is mimicking the Golden State Killer investigation, which included forming a full-time task force dedicated to the case and exploiting publicly accessible DNA databases.

Voigt said the Zodiac case was being investigated part time by a Police Department in a city that filed for municipal bankruptcy.

"There's a formula to follow," Voigt said. "And it's to simply copy what happened to the Golden State Killer."